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Finding the Fourth Proportional to 614.20, 847.21 and 535.70

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Solution

The fourth proportional to 614.20, 847.21 and 535.70 is: 738.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.20 : 847.21 = 535.70 : x
  2. Step 2: Convert to fraction form
    614.20/847.21 = 535.70/x
  3. Step 3: Cross multiply
    614.20x = 847.21 × 535.70
  4. Step 4: Simplify right side
    614.20x = 453,850.40
  5. Step 5: Solve for x
    x = 453,850.40/614.20
  6. Step 6: Final answer
    x = 738.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.